Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ee0ba403545725…

MALICIOUS

PDF

88.7 KB Created: 2021-03-02 21:21:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9609f511ed040b1a994b2be4ea09b8ba SHA-1: be00528d73a95872bcb6d8ee55a8e25604051dbb SHA-256: d0ee0ba403545725a6f8a3015c4dea0a9e91ca154af7e31ad8c1f3e045400862
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV also detected this as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the presence of numerous external URIs and the ML classifier's high confidence indicate malicious intent, likely related to directing users to malicious websites. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=juice+full+movie+m4ufree
    • http://senenetikoxikom.22web.org/gajupidemagafikuferipumow.pdf
    • http://clipshd.design/what_is_the_purpose_of_a_quit_claim_deedgarlq.pdf
    • https://cdn.sqhk.co/gedugari/jaTjjhi/39768572966.pdf
    • http://bokevefinobi.iblogger.org/adidas_platform_white.pdf
    • https://cdn.sqhk.co/zoribakim/iasqqhc/64295646415.pdf
    • http://wotaxatumumodok.sportsontheweb.net/toro_snowblower_parts_dealer_near_me.pdf
    • https://cdn.sqhk.co/zufutetuwume/hJscVji/kaiser_permanente_hawaii_internal_medicine_residency.pdf
    • https://cdn.sqhk.co/kusasuzona/tbLiigd/capstar_for_small_dogs_and_cats.pdf
    • http://govusinixarimi.iblogger.org/bogepozupejimesovofugan.pdf
    • http://vuvezalamosi.22web.org/gb_whatsapp_version_8._0_apk.pdf
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/9129014.pdf
    • http://dalidusiz.mywebcommunity.org/7277882362.pdf
    • http://wirelessinfo.ru/the_hunger_games_2_full_movie_download_in_hindi_dubbed7mq7a.pdf
    • https://cdn.sqhk.co/xajamenujo/hejcagi/94566955368.pdf
    • http://reduslim-italiaoficial.site/swann_camera_internet_setupqze57.pdf
    • http://koolmaxt.online/13461596589h3cia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://liraperuwuw.atwebpages.com/pobodikapaf.pdf
    • https://s3.amazonaws.com/jedobufudajewu/all_bollywood_movie_free_mkv_khatrimaza.pdf
    • https://s3.amazonaws.com/sedowedi/destruction_warlock_pvp_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fa0.bin
e93d4126eb733287e3fbc6e5bd0107eaaa575b3620f34916c7aa690bbad535a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 4776 bytes
font_01_sfnt_off00012fdf.bin
eb8ca00a44bc55f04a609de20c824bc2927a1121123bb0fd425e7defeb504359		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDF 11012 bytes

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